The same year, Jadzia Dax suggested that it was Quark's birthday because of all the Ferengi visitors who arrived at the station. (DS9: "The Nagus")

Beverly Crusher came to Ten Forward once to give Guinan a gift, a tennis racket. Guinan wondered aloud if it was someone's birthday, to which Crusher stated "not unless it is yours." (TNG: "Suspicions")

In 2370, Miles O'Brien asked Kotan Pa'Dar when the last time he saw his son, Rugal. Pa'Dar told O'Brien that it was just after he had his fourth birthday. (DS9: "Cardassians")

In 2371, Miles O'Brien prepared a romantic dinner for his wife Keiko to cheer her up after the school she taught at on Deep Space 9 was closed down due to a lack of students. She wondered why Miles went to so much trouble to make a nice dinner for since it was neither their anniversary nor her birthday. (DS9: "The House of Quark")

Doctor Julian Bashir considered his thirtieth birthday in 2371 a major turning point in his life, although the Human lifespan by then was so long that he was still in the first part of his life. (DS9: "Distant Voices")

Elim Garak mentioned to Quark that he was planning on canceling his date with Tora Ziyal in his holosuites because he had visions that she would present his head to her father, Dukat, as a birthday present. (DS9: "For the Cause")

Keiko O'Brien prepared a surprise birthday party for her husband Miles in 2373, but during the party she actually was possessed by a pah-wraith. For the party she prepared q'parol, which was a big success. (DS9: "The Assignment")

In 2373, Dukat made an announcement that Cardassia Prime had joined the Dominion and promised with the help of the Dominion that, on his oldest son's birthday which was to have been five days from then, that no Klingon would be alive inside Cardassian territory, nor would there be any Maquis settlements within the Cardassian borders. (DS9: "By Inferno's Light")

In 2376, Janeway had to search the databanks for hours on end, but eventually found Lieutenant CommanderTuvok's birthday, and replicated him a cake with a candle on it. He claimed that this was a Human tradition, and Vulcans did not "blow out candles." In the end, he blew it out, claiming that "it was a fire hazard." (VOY: "Fury")

In 2378, Ensign Harry Kim hoped to speak with his mother for the first time in seven years in time for her birthday, due to Operation Watson being successful in establishing contact with Voyager. In a draw, he got one of the lowest isolinear chips, meaning he would be able to speak to her in a couple of months. However, Tom Paris swapped Kim's chip with his, which meant he would be able to speak with her in a couple days. Paris asked Kim in return to sing "Happy Birthday" to her. (VOY: "Author, Author")

In an alternate timeline, the crew of Voyager held Kes' ninth birthday party in the ship's mess hall in 2378. (VOY: "Before and After")

A scene included in the script of "Coming of Age", but not the final episode, would have established that Klingons did not celebrate birthdays like Humans did. Instead, in the words of Worf, "Klingons are born, live as warriors, and die." A somewhat analogous annual celebration was later established. The scene also had musings on Human birthdays, and particularly the fact that Humans looked forward to them until they reached a certain age and it became a source of discomfort.

In the first draft script of Star Trek Generations, Jean-Luc Picard wished Data "Happy Birthday!", saying that, because Data had recently started experiencing emotions, he had "just been reborn."